Sandals with socks PR: colorable repalette (#21650)

Changes:  
> - imageadd: "Made sandal sprites use a standardised colorable
palette."
> - rscdel: "Removed flip flops due to the sprite being identical to
geta sandals."
>  - bugfix: "Fixes caligae (sock) sprite for Unathi."

The Unathi caligae (sock) sprite had its directional variants done
wrong, so all directions but the front facing used only the accent
color.
Changes are not substantial enough for any images of changes.

code/modules/client/preference_setup/loadout/items/shoes.dm

@@ -79,7 +79,6 @@
 	var/list/sandals = list()
 	sandals["sandals"] = /obj/item/clothing/shoes/sandals
 	sandals["rubber clogs"] = /obj/item/clothing/shoes/sandals/clogs
-	sandals["flip flops"] = /obj/item/clothing/shoes/sandals/flipflop
 	sandals["geta"] = /obj/item/clothing/shoes/sandals/geta
 	gear_tweaks += new /datum/gear_tweak/path(sandals)
 

code/modules/clothing/shoes/sandals.dm

@@ -16,12 +16,6 @@
 	icon_state = "geta"
 	item_state = "geta"
 
-/obj/item/clothing/shoes/sandals/flipflop
-	name = "flip flops"
-	desc = "A pair of foam flip flops. For those not afraid to show a little ankle."
-	icon_state = "thongsandal"
-	item_state = "thongsandal"
-
 /obj/item/clothing/shoes/sandals/clogs
 	name = "rubber clogs"
 	desc = "A favorite of barbecue loving fathers, beachgoers, and people with no fashion sense. Don't wear these with socks."

html/changelogs/ElorgRHG-sandals-sprite-stuff.yml

@@ -0,0 +1,15 @@
+# Your name.
+author: ElorgRHG
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, this gets changed to [] after reading.  Just remove the brackets when you add new shit.
+# Please surround your changes in  double quotes ("). It works without them, but if you use certain characters it screws up compiling. The quotes will not show up in the changelog.
+changes:
+  - imageadd: "Made sandal sprites use a standardised colorable palette."
+  - rscdel: "Removed flip flops due to the sprite being identical to geta sandals."
+  - bugfix: "Fixes caligae (sock) sprite for Unathi."